Lock error in Haier washing machine

If you notice a Lock error in your Haier washing machine, do not panic. This is a normal information message notifying the user that the Child Lock feature has been activated. To remove the message from the display, just disable the control panel lock. We'll tell you how to do this.

How can I disable Child Lock?

This is not to say that the “Lock” message is a fault code. The inscription does not indicate any failure, it only notifies that the child mode has been activated. It is very easy to remove the error yourself - just disable the dashboard lock.

To clear the “Lock” message on the Haier SMA, you need to hold down the two buttons “Temperature” and “Steam”.

The method for disabling the Child Lock mode may vary depending on the model of the Hyer washing machine. Some SMAs have a special button “Child Lock", and to disable the lock, just hold down the key for 3 seconds. This function is activated in the same way.

You can understand exactly how the child mode is turned off on your washing machine by studying the instructions for the equipment. The user manual tells you both how to start the function and how to unlock the control panel. Usually, by looking at the tidy, you can guess the method intuitively.

The control module is faulty

It happens that the “Lock” inscription cannot be removed by any means. What to do if you can’t disable child mode? Diagnosis of the Haier ACM main control module will be required.

Diagnostics and repair of the control module is an expensive pleasure. The technician will ask for at least $50 to repair the unit, and about $100 for replacement.Therefore, you can try to revive the washing machine yourself, following the instructions below.

For Haier automatic cars, the main control module is located behind the dashboard. The board is quite large, so it is difficult not to notice it. The algorithm of actions will be as follows:

• disconnect the washing machine from the power supply;
• close the shut-off valve responsible for supplying water to the washing machine;
• unhook the drain and inlet hoses from the machine;
• remove the top cover of the SMA housing (to do this, you need to unscrew the two screws holding it);
• remove the powder receptacle from the machine;
• Unscrew the bolts holding the control panel of the washing machine;
• remove the tidy by releasing the latches that secure it;
• take a photo of how the wires connecting the control panel and the electronic unit are connected;
• disconnect the contacts from the device, move the panel to the side;
• remove the screws securing the main control module;
• remove the board from the case.

Next, inspect the electronic unit. Sometimes defects on the control module are visible to the naked eye. There you can see burns, dark spots, traces of rust, mechanical damage, and swelling.

In some cases, to repair the control module, it is enough to solder the track or replace individual semiconductor elements.

If there are no visible defects, you will have to check each element of the block with a multimeter. Without knowledge in the field of working with electronics, it will be quite difficult to find a breakdown. Therefore, it is better to entrust the diagnosis to service center specialists.

You should not disassemble the washing machine yourself if it is still under warranty. In this case, you have the right to free diagnostics. Therefore, if attempts to reset the “Lock” code are unsuccessful, contact the service center.

In order not to waste time and money on diagnostics, you can completely replace the electronic unit. The module is purchased for a specific SMA Hayer model. The new board is fixed in its original place, the wires are connected to it, and then the washing machine body is assembled.

Then be sure to test the automatic machine. Turn on the device and press the buttons on the control panel. If the “brain” responds to the user’s commands, then the module replacement was completed correctly. Activate the idle wash and wait until the cycle ends. Afterwards, you can operate the SMA as before.

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